Removing Win2K Server from domain.

In my company, there are 2 domains. One domain is the NT4.0 domain with PDC,BDC and other member servers. The other domain is a Win2K server domain, in this domain there is ONLY ONE (1) Win2K server and this is the DC of this particular domain….(no other DCs). I have been asked to demote this Win2K as a DC from its domain…(and basicly decomissioned the Win2K domain) and JOIN this Win2K server (as a member) to the other existing NT4.0 domain. The purpose of this is to a a SINGLE domain only and for the ease of adminstration.

Can this be done ? and how can I achieve this please. ?

Thank you
Jim